... structures in different species and of rudimentary (vestigial) organs; of the recapitulation of past racial history in individual embryonic development; of geographical distribution, extensively documented by Wallace; of the immense variety in forms of plants and animals (to the degree that often one species is not distinct from another); and, to a lesser degree, of paleontology. As originally formulated, Darwinism did not distinguish between acquired characteristics, which are not transmissible ... by heredity, and genetic variations, which are inheritable. Modern knowledge of heredity...

• Word Count: 9269
• Approx Pages: 37

... individually and immutable. But the catastrophist theory was challenged by Darwin and other scientist as well. During the journey aboard the Beagle Darwin noted that certain animals and plants alleged to be extinct had remarkable likenesses to other living creature he had observed in the area. On the Galapagos Islands he observed that each island supported its ... without the consent from the person diagnosed. The belief that the mental characteristics were invariably determined by physiological causes and the postulated existence of the criminal type was a large result of hereditary and ...

• Word Count: 2697
• Approx Pages: 11
• Grade Level: Undergraduate

... selection operates on this variation. From a Human standpoint we did not come directly from apes. Apes did not evolve into Humans. We are related cousins on the Tree of Life. Just because some characteristics are similar does not make us come from apes. Man arises by differentiation. Not only individually, by development from a single egg-cell to the most complicated organism that ... zero. Man alone has succeeded in impressing his stamp on nature, not only by shifting plants and animals from one place to another, but also by climate of his dwelling place, and even the plants and animal...

• Word Count: 1686
• Approx Pages: 7
• Grade Level: Undergraduate

... as we progress, may we see the development of man from the apes. Evolution is the natural process through which organism have acquired their characteristics, structure and function. The past few centuries have witnessed a thorough inventory of the million or more species of plants and animals living today, as well as the thousands of extinct species. Many biologists have studied in detail ... the structure, the functions, habits and distribution of these organisms. The result has been an accurate ... picture of the amazing variety and complexity of life. But at the same time, it ... ...

• Word Count: 1854
• Approx Pages: 7
• Grade Level: High School

... island have distinct habitats, diets, and behaviors, but the mechanisms involved in speciation continue to operate. A single year of drought on the islands can drive evolutionary changes in the finches. Drought diminishes supplies of easily cracked nuts but permits the survival of plants that produce larger, tougher nuts. Droughts thus favor birds with strong, wide beaks that can break these tougher seeds, ... producing populations of birds with these traits. It has been estimated that if droughts occur about once every 10 years ... disguising coloration), the organisms carrying that ge...

• Word Count: 1289
• Approx Pages: 5
• Grade Level: Undergraduate

... individuals" inherited needs and capabilities are basically intimately linked to resources available in their environment, giving those with greater fitness a better chance of survival and the ability to reproduce offspring. The driving force behind evolution is the struggle among entities for reproductive success. Every species desires ... to come, in order for them to live on in a sense. This is the reason that the characteristics and qualities of an offspring are extremely similar to those of their parents. The parent is transferring qualities and similarities from itself to their ne...

• Word Count: 2643
• Approx Pages: 11
• Grade Level: Undergraduate